Word-word relations are concepts

Word-word relations are concepts
Introduction to WG syntax
Richard Hudson
Joensuu November 2010
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The challenge
• How to go beyond single words
– to combinations of words
– to general patterns
• This is the domain of syntax
– the study of how words combine
– including general rules
2
Influences on Word Grammar syntax
• Tesnière (France, 1893-1954)
– dependency structure, not phrase structure
• Halliday (UK, 1925-)
– labeled grammatical functions
• Chomsky (USA, 1928-)
– abstract structures
3
An example
object
subject
[you]
predicative
Try
using
preadjunct
dependency structures!
subject
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Dependency grammar
• History
–
–
–
–
–
–
Panini (350 BC)
Arabic grammarians (700s+)
Some traditional school grammar (1800s)
Russia (e.g. Mel’cuk)
Germany (e.g. Kunze)
Finland (e.g. Karlsson)
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Why not phrase structure?
• Basic assumption of PS:
– We cannot relate words directly to each other.
• Why not?
• What about other areas of thought?
– Social relations: we relate people to each other.
– Spatial relations: we relate objects to each
other.
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My family network
Gretta
John
mother
mother
father
father
brother
me
Colin
daughter
Gaynor
daughter
grandson
Lucy
son
Peter
Alice
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Relations in WG
• Relations are classified
– ‘mother’, ‘son’, etc.
• Each relation is a concept
– just like entities such as ‘dog’ or ‘running’
– but relations have an ‘argument’ and a ‘value’
• Similarly, we classify dependencies
– ‘subject’, ‘adjunct’, etc.
– Traditional 'grammatical functions'.
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Generalising in syntax
• Words are classified by word classes
• Dependencies are classified by functions
• Each of these classifications forms a
taxonomy
– a hierarchy of increasingly specific categories
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The word-class taxonomy
word
noun
verb
common
auxiliary
DOG
CAN
adjective ….
BIG
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Generalising in a network
• A 'rule' is a property applied by inheritance
– e.g. 'A word has a meaning'
• Rules are more or less general, but combine freely
by inheritance
– A verb has a subject
– TAKE has an object
– So: takes has a subject and an object
• and a meaning
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The grammatical-function hierarchy
dependent
valent
subject
adjunct
complement
object
predicative
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Generalising across dependencies
• Again, rules may be more or less general
– a word stands before its dependents
– a verb stands after its subject
– an interrogative auxiliary verb stands before its
subject.
• Thanks to default inheritance, the most
specific rule always wins.
– In other words, rules have exceptions.
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Abstract relations in syntax
• Syntax is abstract!
• Dependencies are very abstract
– defined by many different properties
• Dependencies can also be complex
– One word may depend on many others.
– Mutual dependency is possible.
14
A complex syntactic network
extractee
What
subject
did
complement
predicative
you
say?
subject
extractee
& object
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Simple syntax
a book about the idea of a life after death
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Abstract words in syntax
• Maybe a complete analysis should
recognise abstract, unrealised, words?
• E.g. [you] as the subject of an imperative?
–
–
–
–
Why not, if words are concepts?
We have a concept for 'Superman'
But we also know he doesn't exist
Similarly for the realisation of [you].
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Researching syntax
Here too, networks are everywhere.
• Inside syntax
– What about constructions?
•
•
•
•
•
Between syntax and morphology
Between syntax and semantics
Between syntax and sociolinguistics
Between syntax and psycholinguistics
Between syntax and education
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Constructions are dependency
networks
sharer
sharer
comp
subj
What
is
it
extractee
doing
raining?
subj
subj
extractee & obj
19
Researching syntax and morphology
• Syntactic words are realized by
morphological structures
– e.g. 'WALK, past' realized by {{walk}{ed}}
• Words usually have their own morphology.
• But clitics are different
– e.g. for 'YOU' + 'BE, present': {{you}{'re}}
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French pronouns
Paul
P
{Paul} {
mange
eats
la
the
pomme
apple
{mange}}
{mange}
{la}
{pomme}
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Researching syntax and semantics
• Each word token inherits a sense
– e.g. 'dog', 'eating', 'in'
• But this sense is modified by the dependents
– e.g. 'big dog', 'eating breakfast', 'in bed'
• Exactly how do dependents modify senses?
22
Simple syntax, complex meaning
me eating breakfast then
then < now
me eating breakfast
eating breakfast
speaker
I
eating
ate
breakfast
breakfast.
23
Researching syntax and
sociolinguistics
• Syntactic patterns may have social meaning
–
–
–
–
–
Professor Hudson ~ Dick ~ Dad ~ Grandpa
he is ~ he's
which I live in ~ in which I live
we were ~ we was
I didn't do anything ~ I didn't do nothing.
• How does syntax relate to social context?
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Inherent variability
speaker
we
local person
was
BE, past
speaker
we
•
were
•
educated
person
25
Researching syntax and
psycholinguistics
• Syntactic structure influences processing
• Some structures are harder than others
– That Finland has the best schools in the world
is generally agreed.
• Simpler but harder
– It is generally agreed that Finland has the best
schools in the world.
• More complex but easier
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Extraposition
8 words
That Finland has the best schools in the world is certain.
1 word
It is certain that Finland has the best schools in the world.
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Researching syntax and education
• Our syntactic knowledge grows all through
life:
– new constructions
• Try as he might, he couldn't open it.
– new details of existing constructions
• possibility of, opportunity to
• Much of this growth happens at school.
28
Subordinate clauses per 100 words:
influence of age and grade
29
Research questions for education
• What causes growth in syntax?
– general cognitive growth, e.g. memory
– growth in the language network
• Can grammatical analysis improve writing?
– Yes!
– recent research by Debra Myhill
• How can teachers help?
30
Kiitos
• This slideshow can be downloaded from
www.phon.ucl.ac.uk/home/dick/talks.htm
• For more on Word Grammar, see
www.phon.ucl.ac.uk/home/dick/wg.htm
• My home page, with email address:
www.phon.ucl.ac.uk/home/dick/home.htm
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